Using the EXEC Command Interpreter

You modify the configuration of your router through the software command interpreter called the EXEC (also called enable mode). You must enter the privileged level of the EXEC command interpreter with the enable command before you can use the configure command to configure a new interface or change the existing configuration of an interface. The system prompts you for a password if one has been set.

The system prompt for the privileged level ends with a pound sign (#) instead of an angle bracket (>). At the console terminal, use the following procedure to enter the privileged level:

Step 1 At the user-level EXEC prompt, enter the enable command. The EXEC prompts you for a privileged-level password as follows:

Router> enable

Password:

Step 2 Enter the password (the password is case sensitive). For security purposes, the password is not displayed.

When you enter the correct password, the system displays the privileged-level system prompt (#):

Configuring the Interfaces

Because a PA-FC-1G interface is one of many components in a fibre channel fabric, configuring a PA-FC-1G requires more than assigning an IP address to the PA-FC-1G. Figure 4-1 indicates the logical connections among the main components in a fibre channel fabric. (For the purposes of this section, only the fibre channel switch component of the fibre channel SAN is shown.)

Figure 4-1 shows the TCP tunnel that connects routers in a fibre channel over IP configuration. It also shows the B_port to E_port fibre channel connection between the routers and fibre channel switches.

Figure 4-1 Fibre Channel Fabric Logical Connections

To configure a PA-FC-1G, you must complete a series of tasks in a particular order. The following tasks are presented in the order in which you perform them:

Connecting a PA-FC-1G to a Fibre Channel Switch

The first task in configuring a PA-FC-1G is to establish a physical connection between the PA-FC-1G and the fibre channel switch that connects the PA-FC-1G to a fibre channel SAN. Perform this task for each PA-FC-1G in the fibre channel fabric.

To connect a PA-FC-1G to a fibre channel switch, do the following:

Step 1 Verify that the Status LED on the front of the PA-FC-1G is on. This indicates the PA-FC-1G is installed correctly.

Step 2 Using a fibre optic cable with an LC connector, connect the PA-FC-1G to the fibre channel switch by inserting one end of the cable into the SFP of the PA-FC-1G and inserting the other end of the cable into a port on the switch. (If the fibre channel switch has a GBIC module, use an LC-to-SC fibre optic cable.)

Enabling a PA-FC-1G

After verifying a physical connection between a PA-FC-1G and a fibre channel switch, you must assign an IP address to the PA-FC-1G and then enable it. Perform this task for each PA-FC-1G in the fibre channel fabric.

Step 2 At the privileged-level prompt, enter configuration mode and specify that the console terminal is the source of the configuration commands.

Router# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#

Step 3 Specify the interface to be enabled using the interface command followed by the interface type and address. The address consists of the slot number of the router and the port number on the PA-FC-1G. (Because the PA-FC-1G has only one port, the port number is always 0.)

Router(config)# interface fcpa 2/0

Router(config-if)#

Step 4 You are now in interface configuration mode. Assign an IP address and subnet mask to the PA-FC-1G using the ip address command.

Router(config-if)# ip address 10.1.1.1 255.255.255.0

Step 5 Enable the PA-FC-1G using the no shutdown command.

Router(config-if)# no shutdown

Step 6 Exit interface configuration mode and then configuration mode by pressing Ctrl-Z—hold down the Control key while you press Z—or entering end or exit to return to the EXEC command interpreter.

Router(config-if)# exit

Router(config)# exit

Router#

Step 7 Write the new configuration to NVRAM.

Router# copy running-config startup-config

[OK]

Router#

The system displays an OK message when the configuration has been stored in NVRAM.

Step 8 Verify that the PA-FC-1G and line protocol are up using the show interfaces command followed by the interface type and address.

Router# show interfaces fcpa 2/0

Fcpa2/0 is up, line protocol is up

Hardware is FC over TCP/IP

Default Configuration Values

When an interface is enabled (taken out of shutdown mode) with no additional arguments, the default interface configuration file parameters are operational. Table 4-1 shows PA-FC-1G default configuration values. The default maximum transmission unit (MTU) is the maximum MTU allowed. Decreasing the MTU is not recommended because it will decrease throughput. IP fragmentation is not supported.

Table 4-1 PA-FC-1G Default Configuration Values

Parameter

Configuration Commands

Default Value

MTU

[no] mtu <mtu>

1500

IP MTU

[no] ip mtu <ip-mtu>

1500

Table 4-2 shows TCP tunnel default configuration values. IP TOS is used as part of the overall QoS design to prioritize traffic. For example, to give fibre channel over IP traffic a higher priority than web traffic, set the IP TOS for fibre channel over IP traffic to a number that is lower than the number assigned to IP TOS for web traffic. The lower the number, the higher the priority.

Table 4-2 TCP Tunnel Default Configuration Values

Parameter

Description

Configuration Commands

Default Value

IP TOS

Type of service for the IP layer of the TCP tunnel

[no] ip tos <tos>

0

TCP KAD

Keepalive timer for the TCP tunnel

[no] tcp kad <kad>

7200 seconds

TCP MWS

Maximum window size for the TCP tunnel

[no] tcp mws <mws>

32K

Maximum Window Size Recommendations

When you configure the TCP tunnel, you will need to customize the maximum window size (MWS) for the TCP connection based on the delay across the WAN connection. The larger the delay, the larger the window size needs to be.

If there is no delay across the WAN connection, set the MWS based on these guidelines:

If there is delay across the WAN connection, use an MWS appropriate for the delay. Performance is measured in megabytes per second. Table 4-3 shows that increasing the window size when the delay is large has a significant effect on performance.

Table 4-3 Maximum Window Size Recommendations Based on Delay

Delay (RTT)

32K MWS

64K MWS

128K MWS

256K MWS

512K MWS

2

19 MBps

40 MBps

—

—

—

4

11 MBps

24 MBps

50 MBps

—

—

10

5.5 MBps

11 MBps

22 MBps

46 MBps

—

20

2.9 MBps

6.0 MBps

11 MBps

24 MBps

48 MBps

50

1.2 MBps

2.4 MBps

5.0 MBps

10 MBps

20 MBps

100

—

1.2 MBps

2.5 MBps

5 MBps

10 MBps

200

—

—

1.2 MBps

2.5 MBps

5.1 MBps

Setting Fibre Channel Fabric Timeout Values

Timeout values are defined on each fibre channel switch in a fibre channel fabric. The default error detection (E_D_TOV) and resource allocation (R_A_TOV) timeout values are usually low. You might need to increase them; set the timeout values as appropriate for your SAN and applications.

Timeout values must be configured identically on each fibre channel switch in the fabric. While the TCP tunnel might come up if the timeout values on the switches are not configured identically, this is an exceptional case, and performance and reliability can suffer.

Failure to establish the TCP tunnel (due to mismatched timeout values or any other reason) means that the PA-FC-1G cannot communicate with any part of the fibre channel fabric.

Creating and Configuring a TCP Tunnel

After establishing a physical connection between each PA-FC-1G and a fibre channel switch and after enabling the PA-FC-1G, the next task is to create and configure a TCP tunnel between two PA-FC-1G interfaces. Creating a TCP tunnel establishes a fibre channel over IP connection between two routers.

Note A PA-FC-1G can support a maximum of one TCP tunnel.

To create and configure the TCP tunnel, do the following:

Step 1 At the privileged-level prompt, enter configuration mode and specify the interface to be configured using the interface command followed by the interface type and address (router slot/interface port).

Router# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)# interface fcpa 2/0

Router(config-if)#

Step 2 Create the TCP tunnel.

Router(config-if)# fc-tunnel abc

Router(config-if-fc-tunnel)#

Step 3 Specify the source and destination TCP tunnel IP addresses on each end of the TCP tunnel. The source TCP tunnel IP address must be a host address on the same subnet as the PA-FC-1G. The source and destination IP addresses on one end of the TCP tunnel must match the destination and source IP addresses on the other end of the TCP tunnel, respectively.

On one end of the tunnel:

Router(config-if-fc-tunnel)# srp-ip 10.1.1.2

Router(config-if-fc-tunnel)# dest-ip 10.2.2.2

On the other end of the tunnel:

Router(config-if-fc-tunnel)# srp-ip 10.2.2.2

Router(config-if-fc-tunnel)# dest-ip 10.1.1.2

Step 4 Specify the source and destination TCP tunnel ports on each end of the tunnel. The source and destination ports on one end of the TCP tunnel must match the destination and source ports on the other end of the TCP tunnel, respectively.

On one end of the tunnel:

Router(config-if-fc-tunnel)# src-port 2000

Router(config-if-fc-tunnel)# dest-port 3000

On the other end of the tunnel:

Router(config-if-fc-tunnel)# src-port 3000

Router(config-if-fc-tunnel)# dest-port 2000

Step 5 Customize the maximum window size for the TCP tunnel based on the delay across the WAN connection using the tcp mws command. Do this on both ends of the TCP tunnel. See the "Maximum Window Size Recommendations" section.

Step 6 If required for your TCP tunnel, change the type of service, or keepalive timer using the ip tos and tcp kad commands, respectively. Do this on both ends of the TCP tunnel.

Step 7 Activate the TCP tunnel using the inservice command.

Router(config-if-fc-tunnel)# inservice

Step 8 Exit tunnel configuration mode, interface configuration mode, and configuration mode by pressing Ctrl-Z—hold down the Control key while you press Z—or entering end or exit to return to the EXEC command interpreter.

Router(config-if-fc-tunnel)# exit

Router(config-if)# exit

Router(config)# exit

Router#

Step 9 Write the new configuration to NVRAM as follows:

Router# copy running-config startup-config

[OK]

Router#

Changing the TCP Tunnel Configuration

If you need to tune or modify the TCP tunnel configuration after the TCP tunnel is established, you must first take the TCP tunnel out of service using the no inservice command. The following example shows how to change the IP TOS value from 0 to 1 for an established tunnel.

Router(config-if)# fc-tunnel abc

Router(config-if-fc-tunnel)# no inservice

Router(config-if-fc-tunnel)# ip tos 1

Router(config-if-fc-tunnel)# inservice

Configuring for Multiple SANs

Two fibre channel SANs can be connected by establishing a TCP tunnel between two PA-FC-1G interfaces, each residing in a separate router. Additional PA-FC-1G interfaces can be installed in each router and multiple TCP tunnels can be configured, thus allowing multiple fibre channel SANs to be interconnected.

However, additional TCP tunnels must be defined using different PA-FC-1G port adapters, different IP addresses on different subnets, different source and destination TCP tunnel IP addresses, and different source and destination TCP tunnel ports.

Verifying TCP Tunnel Connectivity

Verifying TCP tunnel connectivity requires checking that the TCP tunnel is correctly configured and verifying that the TCP tunnel is working properly. To verify TCP tunnel connectivity, proceed with the following tasks:

Checking TCP Tunnel Configuration

Check the TCP tunnel configuration using the show fc-tunnel command. Verify that the values shown are those you defined. Make sure that the TCP tunnel is in service, the ARP entry is installed, the SM (session manager) state is up, and the FC Link is up.

ARP entry values

Variable

Description

Installed

ARP entry is installed.

Not installed

ARP entry is not installed.

Not installed (admin state DOWN)

ARP entry is not installed and the PA-FC-1G is administratively down.

Not installed (protocol state DOWN)

ARP entry is not installed and the line protocol is down.

Waiting for adjacency update

Forwarding table has not yet been updated. (When the PA-FC-1G is administratively down or the line protocol is down, the IP adjacencies for the PA-FC-1G are removed.)

SM state values

Variable

Description

SM_UP_ST

TCP connection is established and the B_port is up.

SM_NULL_ST

TCP tunnel is not in service, the PA-FC-1G is shut, or the line protocol is down.

SM_TCP_OPEN_PENDING_ST

TCP is attempting to connect to the peer.

SM_CONN_RETRY_WAIT_ST

TCP will try again to connect to the peer after 3 seconds.

SM_FC_INIT_PENDING_ST

TCP connection is established and the PA-FC-1G is being initialized.

SM_NS_UNLOCK_PENDING_ST

TCP connection is closed and the hardware connection entry is being cleared.

SM_FC_CLOSE_PENDING_ST

TCP connection is closed, the hardware connection entry is removed, and the PA-FC-1G is being put into an offline state.

Router# show fc-tunnel

Interface: Fcpa2/0

FC Tunnel name: abc

INSERVICE: configured ARP entry: Installed

Source IP: 10.1.1.2

Destination IP: 10.2.2.2

Source port: 2000

Destination port: 3000

TCP SACK option set

TCP MWS: 32KB

TCP KAD: 7200sec

IP TOS: 0

MTU: 1500

MSS: 1440

SM state: SM_UP_ST

FC Port Type: B_Port

FC Port WWN : 100000E0B0FFF2CF

Switch Port WWN: 200000C0DD00C248

Switch WWN : 100000C0DD00C248

FC BB_Credit: 128

FC RA_TOV: 120000msec

FC ED_TOV: 60000msec

FC Link state: UP

Checking the TCP Tunnel Is Working Properly

Check that the TCP tunnel is established using the show fc-tunnel tcpconn command. Make sure that t_state is indicated as TCPS_ESTABLISHED. (With the exception of t_state, the output of this command is for debugging purposes only.)

t_state values

Variable

Description

TCPS_ESTABLISHED

TCP connection is established.

TCPS_CLOSED

TCP connection is closed.

TCPS_SYN_SENT

TCP connection has been initiated and a SYN has been sent.

TCPS_SYN_RECEIVED

TCP connection has been initiated, a SYN has been sent, and a SYN has been received by the peer.

Check the TCP tunnel TCP statistics for errors using the show fc-tunnel tcp-statistics command.

Router# show fc-tunnel tcp-statistics

Interface:Fcpa2/0

Rto Min = 500

Rto Max = 60000

Max Conn = 1

Active Opens = 1

Attempt Fails = 0

Estab Resets = 1

Curr Estab = 1

Out Rsts = 1

In Segs = 2

Out Segs = 15324

Retrans Segs = 0

In Errs = 0

Description

Minimum TCP retransmission timeout in msecs

Maximum TCP retransmission timeout in msecs

TCP connections PA-FC-1G can support

TCP connections initiated

TCP connections failed to initiate

TCP connections closed due to Reset

TCP connections established up to now

TCP Resets sent by PA-FC-1G

Segments received, including in error

Segments sent, excluding retransmissions

Segments retransmitted

Segments received in error

Check the TCP tunnel fibre channel statistics for errors using the show fc-tunnel fc-statistics command.

Router# show fc-tunnel fc-statistics

Interface:Fcpa2/0

Link failure events = 0

Sync loss events = 1

Signal loss events = 0

Pseq error events = 0

Rx inv words = 2

rx crc error frames = 0

Delim error frames = 0

Rx class2 frames = 0

Rx class2 octets = 0

Rx class3 frames = 0

Rx class3 octets = 0

Rx class2 frames = 0

Rx class2 octets = 0

Rx class3 frames = 0

Rx class3 octets =

Description

Port link failures

Word Sync loss occurrences

Signal loss occurrences

Primitive error sequence occurrences

Invalid transmission words

Fibre channel frames received with CRC errors

Fibre channel frames received with invalid EOF/length

Fibre channel class 2 frames received

Fibre channel class 2 bytes received

Fibre channel class 3 frames received

Fibre channel class 3 bytes received

Fibre channel class 2 frames sent

Fibre channel class 2 bytes sent

Fibre channel class 3 frames sent

Fibre channel class 3 bytes sent

Verifying PA-FC-1G to Fibre Channel Switch Connectivity

Check the connectivity between each PA-FC-1G and the fibre channel switch by using the show fc-tunnel detail command. Make sure that elp_completed is indicated as 1. This means that an exchange link parameter has been received by the router from the fibre channel switch and that the B_port on the router has been successfully initialized.

Note that in addition to the information shown in the show fc-tunnel command output, the show fc-tunnel detail command output indicates a reason why the connection between the PA-FC-1G and the fibre channel switch was closed (Last close reason) and port information.

Last close reason values

Variable

Description

REASON_CLI_CLOSED

no inservice command was issued by the user.

REASON_CLI_RESET

no fc-tunnel command was issued by the user.

REASON_PEER_CLOSED

Connection was closed by the peer.

REASON_TCP_CLOSED

Connection was closed by TCP because an error was detected.

REASON_ICMP_UNFRAG_CLOSED

Connection was closed because an ICMP unreachable packet was received with UNFRAG code.

REASON_NS_TCP_RESET

Connection was closed by hardware TCP because of multiple retransmissions.

REASON_FC_ERROR

Connection was closed because of a fibre channel protocol error.

REASON_IF_SHUT

Connection was closed because the PA-FC-1G was shut.

REASON_LINE_PROTOCOL_DOWN

Connection was closed because the line protocol is down.

REASON_CLEAR_INTERFACE_ISSUED

clear interface command issued by the user.

REASON_CARD_REMOVED

PA-FC-1G was removed from the router.

Router# show fc-tunnel detail

Interface: Fcpa2/0

FC Tunnel name: abc

INSERVICE: configured ARP entry: Installed

Source IP: 10.1.1.2

Destination IP: 10.2.2.2

Source port: 2000

Destination port: 3000

TCP SACK option set

TCP MWS: 32KB

TCP KAD: 7200sec

IP TOS: 0

MTU: 1500

MSS: 1440

SM state: SM_UP_ST

FC Port Type: B_Port

FC Port WWN : 100000E0B0FFF2CF

Switch Port WWN: 200000C0DD00C248

Switch WWN : 100000C0DD00C248

FC BB_Credit: 128

FC RA_TOV: 120000msec

FC ED_TOV: 60000msec

FC Link state: UP

Last close reason: REASON_IF_SHUT

========== port info ==========

port_type: B

FC Link: UP

Negotiation: Forced

link_status: 0x00000081

op_state: 0x00000008

elp_completed: 1

CPU credits: 29 (remaining off of 32)

ELS ECHO: Enabled

no_of_tcp_ssn: 1

sm_prt_op: 0x82DB

Our BB_CRDT: 128

Our RA_TOV: 20000

Our ED_TOV: 10000

Peer BB_crdt: 27

Peer RA_TOV: 20000

Peer ED_TOV: 10000

Description

TCP tunnel is in service, ARP entry is installed

Source IP address

Destination IP address

Source port

Destination port

Selective acknowledgement set

Maximum window size

Keepalive timer

Type of service

Maximum transmission unit

TCP connection and B_port are up

Fibre channel port on the PA-FC-1G is a B_port

World wide name of the B_port on the PA-FC-1G

World wide name of the E_port on the fibre channel switch

World wide name of the fibre channel switch

Buffer-to-buffer credits of the PA-FC-1G

Resource allocation timeout value (ELP)

Error detection timeout value (from ELP)

B_port is up

Last reason why connection between PA-FC-1G and fibre
channel switch was closed

Fibre channel port on the PA-FC-1G is a B_por

B_port is up

1 Gbps speed forced on the switch E_port

Fibre channel link status from hardware (active)

Fibre channel port status from software (link reset complete)

Exchange link parameter received from the fibre channel switch

Credits remaining for packets from the CPU to NS TCP

B_port to B_port TCP keepalive

History of fibre channel events

Buffer-to-buffer credits of the PA-FC-1G

Resource allocation timeout value (same as in ELP)

Error detection timeout value (same as in ELP)

Fibre channel switch E_port buffer-to-buffer credits

Fibre channel switch E_port resource allocation timeout value

Fibre channel switch E_port error detection timeout value

Verifying End-to-End Fabric Connectivity

Check that the fibre channel fabric is complete by making sure any fibre channel switch can see all other switches in the fibre channel fabric. On most fibre channel switches, this can be done using a type of show command. For example, on the Cisco SN 5428, use the show fcswitch fabric brief command. On an MDS 9000 fibre channel switch, use the show fspf database and show fcdomain commands.

Closing or Removing a TCP Tunnel

Table 4-4 summarizes the commands you can use to close or remove a TCP tunnel.

Table 4-4 Commands for Closing or Removing a TCP Tunnel

Command

Closes a
TCP Tunnel

Removes a
TCP Tunnel

Shuts the
PA-FC-1G Interface

Resets the PA-FC-1G Interface

clear interface fcpa <slot/port>

Closes the tunnel; opens a new tunnel.

no

Shuts the interface; brings up the interface

yes

no fc-tunnel

yes

yes

no

no

no inservice

yes

no

no

no

shut

yes

no

yes

yes

Command examples are based on the following configuration for a TCP tunnel called abc:

Checking the Configuration

After configuring the new interface, use show commands to display the status of the new interface or all interfaces, and use the ping command to check connectivity. This section includes the following subsections:

Using show Commands to Verify the New Interface Status

This section demonstrates how you can use the show commands to verify that new interfaces are configured and operating correctly and that the port adapter appears in them correctly. Sample displays of the output of selected show commands appear in the sections that follow. For complete command descriptions and examples, refer to the publications listed in the "Related Documentation" section on page viii.

If an interface is shut down and you configured it as up, or if the displays indicate that the hardware is not functioning properly, ensure that the interface is properly connected and terminated. If you still have problems bringing up the interface, contact a service representative for assistance. This section includes the following subsections:

Using the show protocols Command

Display protocols configured for the entire system and for specific interfaces using the show protocols command.

Note The outputs that appear in this document may not match the output you receive when running these commands. The outputs in this document are examples only.

The following is an example of the show protocols command:

Router# show protocols fcpa 6/0

Fcpa6/0 is up, line protocol is up

Internet address is 10.1.1.1/24

Router#

Using the show running-config Command

Display the running configuration file using the show running-config command.

Note The outputs that appear in this document may not match the output you receive when running these commands. The outputs in this document are examples only.

The following is an example of the show running-config command for the PA-FC-1G in slot 2:

Router# show running-config interface fcpa 2/0

interface fcpa2/0

ip address 10.1.1.1 255.255.255.0

fc-tunnel abc

src-ip 10.1.1.2

dest-ip 10.2.2.2

src-port 2000

dest-port 3000

tcp sack

tcp mws 64

tcp kad 7200

ip tos 0

no inservice

Using the show startup-config Command

Display the configuration stored in the NVRAM using the show startup-config command.

Note The outputs that appear in this document may not match the output you receive when running these commands. The outputs in this document are examples only.

The following is an example of the show startup-config command:

Router# show startup-config

Current configuration : 1090 bytes

!

version 12.2

no parser cache

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname hw-5.14-7401asr-a

!

boot system disk0:c7400-js-mz.ggnear

!

ip subnet-zero

!

!

no ip domain lookup

!

ip cef

mpls ldp log-neighbor-changes

!

!

!

!

!

!

!

!

!

no voice hpi capture buffer

no voice hpi capture destination

!

!

!

!

!

!

interface GigabitEthernet0/0

ip address 9.1.1.10 255.255.255.0

duplex full

speed 1000

media-type gbic

negotiation auto

!

interface GigabitEthernet0/1

no ip address

shutdown

duplex full

speed 1000

media-type gbic

negotiation auto

!

interface Fcpa1/0

ip address 10.1.1.1 255.255.255.0

fc-tunnel GGPA

src-ip 10.1.1.10

dest-ip 10.2.1.11

src-port 5200

dest-port 2000

tcp sack

tcp mws 32

tcp kad 7200

ip tos 0

inservice

!

ip classless

ip route 10.2.1.0 255.255.255.0 9.1.1.11

no ip http server

!

!

!

!

!

!

call rsvp-sync

!

!

mgcp profile default

!

dial-peer cor custom

!

!

!

!

gatekeeper

shutdown

!

!

line con 0

exec-timeout 0 0

line aux 0

line vty 0 4

login

line vty 5 15

login

!

!

end

Using the show version or show hardware Commands

Display the configuration of the system hardware, the number of each interface type installed, the Cisco IOS software version, the names and sources of configuration files, and the boot images using the show version (or show hardware) command.

Note The outputs that appear in this document may not match the output you receive when running these commands. The outputs in this document are examples only.

Following is an example of the show version command from a Cisco 7401ASR router:

Note The outputs that appear in this document may not match the output you receive when running these commands. The outputs in this document are examples only.

Using the show interfaces type port-adapter-slot-number/interface-port-number command displays status information about a specific type of interface—in this example, a fibre channel interface—on a Cisco 7401ASR router.

Following is an example of the show interfaces command for a Cisco 7401ASR router. In this example, the PA-FC-1G is in slot 1.

Using the ping Command to Verify Network Connectivity

Using the ping command, you can verify that an interface port is functioning properly. This section provides a brief description of this command. Refer to the publications listed in the "Related Documentation" section on page viii for detailed command descriptions and examples.

The ping command sends echo request packets out to a remote device at an IP address that you specify. After sending an echo request, the system waits a specified time for the remote device to reply. Each echo reply is displayed as an exclamation point (!) on the console terminal; each request that is not returned before the specified timeout is displayed as a period (.). A series of exclamation points (!!!!!) indicates a good connection; a series of periods (.....) or the messages [timed out] or [failed] indicate a bad connection.

Following is an example of a successful ping command to a remote server with the address 10.0.0.10:

If the connection fails, verify that you have the correct IP address for the destination and that the device is active (powered on), and repeat the ping command.

Pinging the PA-FC-1G

After the PA-FC-1G is enabled using the no shut command, pinging the PA-FC-1G IP address should be successful. Pinging the TCP tunnel source and destination IP addresses is successful only after the TCP tunnel has been brought into service using the inservice command.

Note The TCP tunnel source IP address cannot be the source address of a ping command.

Note The TCP tunnel source and destination IP addresses cannot be reached using the telnet command.

Troubleshooting

This section describes troubleshooting the physical connectivity between the fibre channel switch and the PA-FC-1G. Possible problems, observations and comments, and solutions are indicated for the following troubleshooting symptoms:

•PA-FC-1G is down and the line protocol is down

•B_port is not initialized

•TCP tunnel is not established

•Fibre channel fabric is segmented

•Lower than expected performance

PA-FC-1G Is Down and the Line Protocol Is Down

Possible Problem

Observations and Comments

Solutions

Loss of physical connectivity or optical signal

FC Link LED is off or amber

Make sure the SFP is inserted properly in the fibre channel switch or the PA-FC-1G.

Check for a faulty fibre channel cable by using a different fibre channel cable.

Make sure the fibre channel cable is correctly connected to the fibre channel switch or the PA-FC-1G.

Speed mismatch between the fibre channel switch and the PA-FC-1G

PA-FC-1G currently supports 1 Gbps

Make sure the speed of the port on the fibre channel switch to which the PA-FC-1G is connected is manually set to 1 Gbps.

PA-FC-1G is administratively shut down

Use the no shut command to bring up the PA-FC-1G.

B_Port Is Not Initialized

Possible Problem

Observations and Comments

Solutions

Exchange Link Parameter (ELP) is not being received from the connecting fibre channel switches